??? /// <summary>?
????/// 彩色圖片轉化為黑白?
????/// </summary>?
????/// <param name="source"></param>?
????/// <returns></returns>?
????public static Bitmap ConvertToGrayscale(Bitmap bitmap)?
????{?
????????Bitmap bm = new Bitmap(bitmap.Width, bitmap.Height);?
????????for (int y = 0; y < bm.Height; y++)?
????????{?
????????????for (int x = 0; x < bm.Width; x++)?
????????????{?
????????????????Color c = bitmap.GetPixel(x, y);?
????????????????int rgb = (int)(c.R * 0.3 + c.G * 0.59 + c.B * 0.11);?
????????????????bm.SetPixel(x, y, Color.FromArgb(rgb, rgb, rgb));?
????????????}?
????????}?
????????return bm;?
????}

轉載于:https://www.cnblogs.com/top5/archive/2009/09/29/1576280.html

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